1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de692887a4fd0f95a2fdb1446e8c7d049afa18d15fd34e3005b0ee86429bda2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9833975-575f-4e59-885c-d366f2c8446b.json and https://artists.proofprofile.net/proofs/artist/b9833975-575f-4e59-885c-d366f2c8446b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f24816e238286ce65f7509f775acc0940ffa0688daa293233921bd2db2516da. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF221611699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f83d017cc98942bb969df24ee31e3f67ff86b571e7152baf5147576068ea5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1482854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b79eb25a5173239f34f0a7fad8ef5f1e807ffb818256b9f5e247b06e63c296. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1482862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a3b78bff3a0208cf5afa087acb6e972e99cffe88ce932d12cce653ccb1dcf. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1497702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5c512ff528ae0939e064081143108a519cf1123b2e5b0d4110ef8ab67aebc7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARHXW2106086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b4c8039d05864515c7c15ab31682e83099b71f047d56951145d339c085bea4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARHXW2106101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4aeba1fc54e706bf2762531e33b60dd5ad574b1a1c2d3ce587107e77dd97c. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF049700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529906f1c5fc63ad08f161d2dce42f44f070dfcd94f8f26e3adb1bb14edaa7aa. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR8L71500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be204e9f521a14ac6610c67bc67c282f6128dfe14a9923c3769e6b0d50d741. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR8L71500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f61b8b5fe3925c908b1974a37f2e1a74d3c72d8f43f424e7b2be31b18cdbc0d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR8L71500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abb5c2e30bade34d577e5a33f51f643c20a6de7569e178bca2c41af617aad9d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR8L71500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e601684295e28c2ac3acb4edaa4f0a5b043e46821f2f594b46213938aafc8de. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR8L71500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e0aaeba72ab7162629317ffebc2cbbe7525bc29454ed41ea495aed41bf15b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8496323b8b50e5ec1ada93a62f9b1784737b275ba93b7c52dc87af146e24b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2988a169886cd3e913f1f4d06e0a422fbecad2d8cd75d57459b2a44c116f300d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART721410281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3f083c4a3bdd18a16f4d2b3f698fd2fe4778f68e23ae1017107ddc9dc7881c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ART721410282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd1ca66c490e0c5b6b56c8bb7ed591d5ee5ec55eddb93ac640872a1148cc41. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:51:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF221500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83dc6afedab8908529308735e5af359cc7fab463fd1b74f16923883e60cae2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF220602296.